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CVE Record

CVE-2025-14831: Gnutls: gnutls: denial of service via excessive resource consumption during certificate verification

A flaw was found in GnuTLS. This vulnerability allows a denial of service (DoS) by excessive CPU (Central Processing Unit) and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names (SANs).

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2025-14831 is a GnuTLS denial-of-service flaw. A remote, unauthenticated party can present specially crafted certificates that consume excessive CPU and memory during certificate verification. Business impact is availability degradation, not data theft or system takeover, based on the provided CVSS and description.

Executive priority

Treat as a routine but timely availability-risk patch. Prioritize externally exposed and certificate-heavy workloads. There is no provided evidence of active exploitation or confidentiality impact.

Technical view

The flaw is CWE-407, excessive algorithmic complexity, in GnuTLS certificate verification. Certificates with many name constraints and subject alternative names can cause high resource consumption. Red Hat lists affected gnutls packages across RHEL 8, 9, 10 streams, and libtasn1 on some RHEL 8 extended support streams.

Likely exposure

Systems are most exposed where Red Hat Enterprise Linux services or clients use GnuTLS to verify untrusted or externally supplied certificates. Internet-facing TLS endpoints, certificate-processing services, and outbound clients that contact untrusted peers deserve review first.

Exploitation context

The CVSS vector is network, low complexity, no privileges, and no user interaction. The impact is limited to availability. The source bundle marks KEV as false, and no provided source states active exploitation.

Researcher notes

Avoid assuming all GnuTLS deployments are affected beyond the listed Red Hat packages. The bundle provides affected package versions and advisory references, but not detailed fixed-version mappings in-line. Validate exposure by package inventory and vendor errata applicability.

Mitigation direction

  • Apply relevant Red Hat RHSA updates for affected RHEL streams.
  • Prioritize systems processing certificates from untrusted networks or external peers.
  • If updates are unavailable, check Red Hat guidance for supported mitigations.
  • Monitor certificate-verifying services for abnormal CPU or memory consumption.

Validation and detection

  • Inventory RHEL systems using affected gnutls or libtasn1 packages.
  • Compare installed package versions against the affected versions listed for each RHEL stream.
  • Confirm applicable Red Hat errata are installed through normal patch management evidence.
  • Review service dependencies to identify applications relying on GnuTLS certificate verification.
Prepared
Confidence
medium
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-407: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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description · low confidence lookup

Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2025-14831 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
2ADP providers
29Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4redhat

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2025-14831Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. Source timelineredhat

    Reported to Red Hat.

  3. Source timelineredhat

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 10gnutls, 0:3.8.10-3.el10_1affected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Supportgnutls, 0:3.8.9-9.el10_0.17affected
Red HatRed Hat Enterprise Linux 8gnutls, 0:3.6.16-8.el8_10.5affected
Red HatRed Hat Enterprise Linux 8gnutls, 0:3.6.16-8.el8_10.5affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportgnutls, 0:3.6.14-10.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibtasn1, 0:4.13-3.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Ongnutls, 0:3.6.14-10.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onlibtasn1, 0:4.13-3.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportgnutls, 0:3.6.16-5.el8_6.5affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportlibtasn1, 0:4.13-3.el8_6.2affected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Ongnutls, 0:3.6.16-5.el8_6.5affected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onlibtasn1, 0:4.13-3.el8_6.2affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicegnutls, 0:3.6.16-7.el8_8.4affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicelibtasn1, 0:4.13-4.el8_8.1affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionsgnutls, 0:3.6.16-7.el8_8.4affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionslibtasn1, 0:4.13-4.el8_8.1affected
Red HatRed Hat Enterprise Linux 9gnutls, 0:3.8.3-10.el9_7affected
Red HatRed Hat Enterprise Linux 9gnutls, 0:3.8.3-10.el9_7affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionsgnutls, 0:3.7.6-21.el9_2.5affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportgnutls, 0:3.8.3-4.el9_4.5affected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Supportgnutls, 0:3.8.3-6.el9_6.3affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-businesscentral-monitoring-rhel8, 7.13.5-4.1777325677affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-businesscentral-rhel8, 7.13.5-4.1777325711affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-controller-rhel8, 7.13.5-4.1777325710affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-dashbuilder-rhel8, 7.13.5-3.1777325680affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-kieserver-rhel8, 7.13.5-4.1777325709affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-process-migration-rhel8, 7.13.5-4.1777325680affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-smartrouter-rhel8, 7.13.5-4.1777325708affected
Red HatRed Hat AI Inference Server 3.2rhaiis/model-opt-cuda-rhel9, 1780681984affected
Red HatRed Hat AI Inference Server 3.2rhaiis/vllm-cuda-rhel9, 1775740563affected
Weakness

CWE details

CWE-407

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-407 · source CWE mapping

Inefficient Algorithmic Complexity

Inefficient Algorithmic Complexity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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